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NOVA ScienceNOW

Send a Secret Message

  • By Melissa Salpietra
  • Posted 07.01.07
  • NOVA scienceNOW

Want to write a secret message to a friend? Use our encoder: Just type your message, address it, and send it along. You can also receive encoded messages and decipher them online.

Launch Interactive

Write a note, encode it, and send it to a friend for decoding.

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  • Kryptos: Expert Q&A

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  • Twin Prime Conjecture

    New insight into a 2,300-year-old mystery surrounding prime numbers inspires a song.

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